Anisotropic in-situ stretching-strain engineering of flexible multilayer thin-film nanogenerators with Cu interlayers

Ye Seul Jung, Hong Je Choi, Jae Woo Park, Yong Soo Cho

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

Abstract

Strain engineering has been extensively recognized as an influencing methodology in finely modulating properties of materials. However, there has been no report of proposing the stretching-strain-dependent piezoelectricity in flexible thin-film nanogenerators processed with deliberate lattice strain. Herein, we propose two combined ways of enhancing piezoelectricity and thus electromechanical energy harvesting performance, i.e., imposing a considerable level of internal stress in ZnO thin films by an in-situ deposition method using a substrate-stretching mode and incorporating a metallic interlayer between the ZnO thin films to form a multi-layered structure. The intentional strain results primarily in an elongation of unit cell along the vertical axis and a larger contribution to spontaneous polarization. As a highlight, the highest stretching strain of ~ 4.87% induced a ~ 212% enhancement of output voltage and a ~89% increase of output current in the final optimized thin-film nanogenerators consisting of Cu-interlayered ZnO multilayer thin films.

Original languageEnglish
Article number105690
JournalNano Energy
Volume82
DOIs
Publication statusPublished - 2021 Apr

Bibliographical note

Funding Information:
This work was financially supported by grants from the National Research Foundation of Korea (NRF-2016M3A7B4910151), the Industrial Strategic Technology Development Program (#10079981) by the Ministry of Trade, Industry and Energy, Korea (MOTIE), and the Creative Materials Discovery Program by the Ministry of Science and ICT (2018M3D1A1058536).

Funding Information:
This work was financially supported by grants from the National Research Foundation of Korea ( NRF-2016M3A7B4910151 ), the Industrial Strategic Technology Development Program ( #10079981 ) by the Ministry of Trade, Industry and Energy, Korea (MOTIE), and the Creative Materials Discovery Program by the Ministry of Science and ICT ( 2018M3D1A1058536 ).

Publisher Copyright:
© 2020 Elsevier Ltd

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)
  • Electrical and Electronic Engineering

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